Overview

overview

9

Static

static

1

SteamSetup.exe

windows10-2004-x64

9

SteamSetup.exe

windows11-ltsc_2024-x64

9

Sharing

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General

  • Target
    SteamSetup.exe
  • Size 2.3MB
  • Sample260620-3c7b1sat2q
  • SHA256 7d3654531c32d941b8cae81c4137fc542172bfa9635f169cb392f245a0a12bcb
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
adwaredefense_evasiondiscoverypersistenceprivilege_escalationransomwarespywaretrojan

Malware Config

Targets

    • Target
      SteamSetup.exe
    • Size 2.3MB
    • SHA256 7d3654531c32d941b8cae81c4137fc542172bfa9635f169cb392f245a0a12bcb
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    9/10
    defense_evasiondiscoverypersistenceprivilege_escalationransomwarespywaretrojanadware

    • Renames multiple (6114) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

      ransomware

    • Adds Run key to start application

      persistence

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

      persistence

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2
T1547

Active Setup

1
T1547.014

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Access Token Manipulation

1
T1134

Create Process with Token

1
T1134.002

Boot or Logon Autostart Execution

2
T1547

Active Setup

1
T1547.014

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Access Token Manipulation

1
T1134

Create Process with Token

1
T1134.002

Modify Registry

4
T1112

Subvert Trust Controls

2
T1553

Install Root Certificate

2
T1553.004

Credential Access

Discovery

Peripheral Device Discovery

2
T1120

Query Registry

7
T1012

System Information Discovery

6
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Time Discovery

1
T1124

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks